<?php
if (!defined('ABSPATH')) { exit; }
final class LWEK_Kit {
    const OPTION = 'lwek_enabled_modules';
    private static $instance;
    private $modules;
    private $loaded = [];
    private $booted = false;
    private $conflicts = [];
    public static function instance() {
        if (!self::$instance) { self::$instance = new self(); }
        return self::$instance;
    }
    private function __construct() {
        $this->modules = require LWEK_PATH . 'includes/modules.php';
        // Register integration hooks immediately; Elementor may initialize lazily.
        add_action('plugins_loaded', [$this, 'boot'], 30);
        add_action('init', [$this, 'boot'], 1);
        add_action('elementor/elements/categories_registered', [$this, 'category']);
        add_action('elementor/widgets/register', [$this, 'widgets']);
        add_action('wp_enqueue_scripts', [$this, 'assets']);
        add_action('elementor/editor/before_enqueue_scripts', [$this, 'editor_assets'], 30);
        add_action('elementor/frontend/after_register_styles', [$this, 'assets']);
        add_action('elementor/frontend/after_register_scripts', [$this, 'assets']);
        add_action('admin_menu', [$this, 'admin_menu']);
        add_action('admin_enqueue_scripts', [$this, 'admin_assets']);
        add_action('admin_post_lwek_save_modules', [$this, 'save']);
        add_action('admin_post_lwek_deactivate_legacy', [$this, 'deactivate_legacy']);
        add_action('admin_notices', [$this, 'notices']);
        add_filter('plugin_action_links_' . plugin_basename(LWEK_FILE), [$this, 'action_links']);
    }
    public static function activate() {
        $modules = require LWEK_PATH . 'includes/modules.php';
        add_option(self::OPTION, array_fill_keys(array_keys($modules), 1), '', false);
        self::instance()->clear_elementor_cache();
    }
    public function enabled() {
        $saved = get_option(self::OPTION, null);
        $result = [];
        foreach ($this->modules as $key => $module) {
            // 已有模块沿用保存值；新增模块未写入 option 时默认关闭，避免升级后自动出现在编辑器。
            $result[$key] = is_array($saved) && array_key_exists($key, $saved) ? !empty($saved[$key]) : false;
        }
        return $result;
    }
    /** Check active plugins, including renamed directories and network activation. */
    public function legacy_plugins() {
        $network = is_multisite() ? (array) get_site_option('active_sitewide_plugins', []) : [];
        $active = array_unique(array_merge((array) get_option('active_plugins', []), array_keys($network)));
        $found = [];
        foreach ($active as $plugin) {
            if ($plugin === plugin_basename(LWEK_FILE) || validate_file($plugin) !== 0) { continue; }
            $file = WP_PLUGIN_DIR . '/' . $plugin;
            if (!is_readable($file)) { continue; }
            $header = get_file_data($file, ['domain' => 'Text Domain']);
            foreach ($this->modules as $key => $module) {
                if ($plugin === $module['legacy'] || basename($plugin) === basename($module['legacy']) || $header['domain'] === $module['folder']) {
                    $found[$key][$plugin] = isset($network[$plugin]);
                }
            }
        }
        return $found;
    }
    public function boot() {
        if ($this->booted) { return; }
        $this->conflicts = $this->legacy_plugins();
        if (!did_action('elementor/loaded') && !defined('ELEMENTOR_VERSION')) { return; }
        if (defined('ELEMENTOR_VERSION') && version_compare(ELEMENTOR_VERSION, '3.5.0', '<')) { return; }
        $this->booted = true;
        foreach ($this->enabled() as $key => $on) {
            if (!$on || isset($this->conflicts[$key])) { continue; }
            $module = $this->modules[$key];
            if (!empty($module['min_elementor']) && (!defined('ELEMENTOR_VERSION') || version_compare(ELEMENTOR_VERSION, $module['min_elementor'], '<'))) { continue; }
            // Also guard against modules manually loaded as MU plugins.
            if (class_exists($module['class'], false) || class_exists($module['legacy_class'], false) || (!empty($module['legacy_function']) && function_exists($module['legacy_function'])) || ($key === 'pdf-library' && function_exists('alai_pdf_render_library'))) {
                $this->conflicts[$key] = ['手动加载的独立组件 / MU 插件' => true];
                continue;
            }
            $this->loaded[$key] = $module;
        }
        if (isset($this->loaded['pdf-library'])) {
            require_once LWEK_PATH . 'modules/alai-pdf-library/backend.php';
        }
        if (isset($this->loaded['whatsapp-inquiry'])) {
            require_once LWEK_PATH . 'modules/fucuo-whatsapp-inquiry/social-preview.php';
        }
    }
    public function category($manager) {
        $this->boot();
        if ($this->loaded) {
            $manager->add_category('laowang-elementor-kit', ['title' => 'FUCUO Elements', 'icon' => 'fa fa-cubes']);
        }
    }
    private function supports_widget_runtime($module) {
        return empty($module['nested']) || (
            class_exists('Elementor\\Widget_Base')
            && class_exists(\Elementor\Modules\NestedElements\Base\Widget_Nested_Base::class)
            && class_exists(\Elementor\Modules\NestedElements\Controls\Control_Nested_Repeater::class)
            && \Elementor\Plugin::instance()->experiments->is_feature_active('container')
        );
    }
    public function widgets($manager) {
        $this->boot();
        if (!class_exists('Elementor\\Widget_Base')) { return; }
        $this->assets();
        foreach ($this->loaded as $module) {
            if (!$this->supports_widget_runtime($module)) { continue; }
            require_once LWEK_PATH . 'modules/' . $module['folder'] . '/widget.php';
            $class = $module['class'];
            $manager->register(new $class());
        }
    }
    public function assets() {
        $this->boot();
        foreach ($this->loaded as $module) {
            if (!$this->supports_widget_runtime($module)) { continue; }
            $assets  = isset($module['assets']) && is_array($module['assets']) ? $module['assets'] : [];
            $version = !empty($module['version']) ? $module['version'] : LWEK_VERSION;
            $base    = LWEK_URL . 'modules/' . $module['folder'] . '/assets/';

            // 通用扩展点：复杂模块自行注册资源；这里不出现任何模块名判断。
            if (!empty($assets['callback']) && is_callable($assets['callback'])) {
                call_user_func($assets['callback'], $version);
                continue;
            }

            $extra_scripts = isset($assets['extra_scripts']) && is_array($assets['extra_scripts']) ? $assets['extra_scripts'] : [];
            $extra_handles = [];
            foreach ($extra_scripts as $extra) {
                wp_register_script(
                    $extra['handle'],
                    $base . $extra['file'],
                    isset($extra['deps']) ? $extra['deps'] : [],
                    $version,
                    true
                );
                $extra_handles[] = $extra['handle'];
            }

            if (!empty($assets['style']['handle'])) {
                wp_register_style(
                    $assets['style']['handle'],
                    $base . $assets['style']['file'],
                    isset($assets['style']['deps']) ? $assets['style']['deps'] : [],
                    $version
                );
            }

            if (!empty($assets['script']['handle'])) {
                $deps = array_merge(
                    ['elementor-frontend'],
                    $extra_handles,
                    isset($assets['script']['deps']) ? $assets['script']['deps'] : []
                );
                wp_register_script(
                    $assets['script']['handle'],
                    $base . $assets['script']['file'],
                    array_values(array_unique($deps)),
                    $version,
                    true
                );
            }
        }
    }
    public function editor_assets() {
        $this->boot();
        foreach ($this->loaded as $module) {
            if (!$this->supports_widget_runtime($module)) { continue; }
            $asset = $module['assets']['editor'] ?? null;
            if (!$asset) { continue; }
            wp_enqueue_script(
                $asset['handle'],
                LWEK_URL . 'modules/' . $module['folder'] . '/assets/' . $asset['file'],
                $asset['deps'] ?? [],
                $module['version'] ?? LWEK_VERSION,
                true
            );
        }
    }
    public function admin_menu() {
        add_menu_page('FUCUO Elements · Elementor 组件库', 'FUCUO 组件库', 'manage_options', 'laowang-elementor-kit', [$this, 'page'], 'dashicons-screenoptions', 58);
        add_submenu_page('laowang-elementor-kit', '组件管理', '组件管理', 'manage_options', 'laowang-elementor-kit', [$this, 'page']);
        if (isset($this->loaded['pdf-library'])) {
            add_submenu_page('laowang-elementor-kit', 'PDF 画册', 'PDF 画册', 'manage_options', 'edit.php?post_type=alai_pdf_book');
            add_submenu_page('laowang-elementor-kit', '资料分类', '资料分类', 'manage_options', 'edit-tags.php?taxonomy=alai_pdf_category&post_type=alai_pdf_book');
            add_submenu_page('laowang-elementor-kit', '下载客户资料', '下载客户资料', 'manage_options', 'edit.php?post_type=alai_pdf_lead');
        }
    }
    public function admin_assets($hook) {
        if ($hook !== 'toplevel_page_laowang-elementor-kit') { return; }
        wp_enqueue_style('lwek-admin', LWEK_URL . 'assets/admin.css', [], LWEK_VERSION);
        wp_enqueue_script('lwek-admin', LWEK_URL . 'assets/admin.js', [], LWEK_VERSION, true);
    }
    public function action_links($links) {
        array_unshift($links, '<a href="' . esc_url(admin_url('admin.php?page=laowang-elementor-kit')) . '">组件管理</a>');
        return $links;
    }
    public function notices() {
        $screen = get_current_screen();
        if (!$screen || !in_array($screen->id, ['plugins', 'plugins-network', 'toplevel_page_laowang-elementor-kit'], true)) { return; }
        if (!current_user_can('manage_options')) { return; }
        if (!did_action('elementor/loaded')) {
            echo '<div class="notice notice-warning"><p>FUCUO 组件库：请先安装并启用 Elementor（免费版即可），启用后组件自动生效。</p></div>';
        } elseif (defined('ELEMENTOR_VERSION') && version_compare(ELEMENTOR_VERSION, '3.5.0', '<')) {
            echo '<div class="notice notice-warning"><p>FUCUO 组件库需要 Elementor 3.5 或更高版本。</p></div>';
        }
        if ($this->conflicts) {
            $names = [];
            foreach ($this->conflicts as $key => $plugins) { $names[] = $this->modules[$key]['title']; }
            echo '<div class="notice notice-warning"><p>FUCUO 组件库检测到独立插件仍在加载：' . esc_html(implode('、', $names)) . '。这些组件暂由原插件提供，合集开关不能控制原插件。请先停用对应独立插件，再使用合集。<a href="' . esc_url(admin_url('admin.php?page=laowang-elementor-kit')) . '">前往组件管理</a></p></div>';
        }
    }
    public function save() {
        if (!current_user_can('manage_options')) { wp_die('无权修改组件设置。', '', ['response' => 403]); }
        check_admin_referer('lwek_save_modules');
        $values = [];
        foreach ($this->modules as $key => $module) {
            $value = isset($_POST['modules'][$key]) && is_string($_POST['modules'][$key])
                ? sanitize_text_field(wp_unslash($_POST['modules'][$key]))
                : '';
            $values[$key] = $value === '1' ? 1 : 0;
        }
        $changed = $this->enabled() !== array_map('boolval', $values);
        update_option(self::OPTION, $values, false);
        if ($changed) { $this->clear_elementor_cache(); }
        wp_safe_redirect(admin_url('admin.php?page=laowang-elementor-kit&saved=1'));
        exit;
    }
    private function clear_elementor_cache() {
        if (class_exists('\\Elementor\\Plugin') && isset(\Elementor\Plugin::$instance->files_manager)) {
            $manager = \Elementor\Plugin::$instance->files_manager;
            if (is_callable([$manager, 'clear_cache'])) { $manager->clear_cache(); }
        }
        do_action('lwek/modules_updated');
    }
    public function deactivate_legacy() {
        if (!current_user_can('manage_options') || !current_user_can('activate_plugins')) { wp_die('无权停用插件。', '', ['response' => 403]); }
        check_admin_referer('lwek_deactivate_legacy');
        require_once ABSPATH . 'wp-admin/includes/plugin.php';
        foreach ($this->legacy_plugins() as $plugins) {
            foreach ($plugins as $plugin => $network) {
                if (!$network) { deactivate_plugins($plugin, false, false); }
            }
        }
        $this->clear_elementor_cache();
        wp_safe_redirect(admin_url('admin.php?page=laowang-elementor-kit&migrated=1'));
        exit;
    }
    private static function notice_requested($key) {
        // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Read-only banner flag; does not execute an action.
        return isset($_GET[$key]) && is_string($_GET[$key]) && sanitize_text_field(wp_unslash($_GET[$key])) === '1';
    }
    public function page() {
        if (!current_user_can('manage_options')) { return; }
        $enabled = $this->enabled();
        $legacy = $this->legacy_plugins();
        $total = count($this->modules);
        ?>
        <div class="wrap lwek-admin">
            <div class="lwek-hero"><div><span class="lwek-eyebrow">FUCUO / ELEMENTS</span><h1>FUCUO Elements · Elementor 组件库 <small>v<?php echo esc_html(LWEK_VERSION); ?></small></h1><p>一个插件，统一管理 <?php echo esc_html($total); ?> 个 Elementor 组件。</p></div><span class="lwek-author">建站老王</span></div>
            <?php if (self::notice_requested('saved')) { ?><div class="notice notice-success inline"><p>组件开关已保存。请重新打开或刷新 Elementor 编辑器；如前台仍显示旧内容，请清除网站页面缓存和 CDN 缓存。</p></div><?php } ?>
            <?php if (self::notice_requested('migrated')) { ?><div class="notice notice-success inline"><p>已停用本站检测到的原独立插件，数据保留。网络启用的插件请到网络管理中单独停用。</p></div><?php } ?>
            <?php if ($legacy) { ?><div class="lwek-note"><strong>检测到原独立插件仍处于启用状态</strong><p>先勾选要使用的合集组件并保存，再停用对应独立插件。此操作不会删除页面配置、画册或客户资料。</p>
                <?php if (current_user_can('activate_plugins')) { ?><form action="<?php echo esc_url(admin_url('admin-post.php')); ?>" method="post"><input type="hidden" name="action" value="lwek_deactivate_legacy"><?php wp_nonce_field('lwek_deactivate_legacy'); ?><button type="submit" class="button">停用本站原独立插件，使用合集</button></form><?php } ?>
                <p>若为网络启用，请到「网络管理 → 插件」停用对应插件。</p></div><?php } ?>
            <div class="lwek-note"><strong>开关说明</strong><p>开启：可在 Elementor「FUCUO 组件库」分组中使用。关闭：不注册、不加载该模块，编辑器中不显示，已有页面中的该组件也会暂时停止渲染。原配置与数据库资料保留，重新开启后恢复。</p><p>原组件标识保持不变，方便已有页面切换到合集。关闭已在使用的组件前，建议先替换页面内容；组件关闭期间请勿删除编辑器中的缺失组件占位。</p></div>
            <form action="<?php echo esc_url(admin_url('admin-post.php')); ?>" method="post" id="lwek-modules-form">
                <input type="hidden" name="action" value="lwek_save_modules"><?php wp_nonce_field('lwek_save_modules'); ?>
                <div class="lwek-toolbar"><strong>组件管理 <span id="lwek-count"><?php echo esc_html(count(array_filter($enabled))); ?></span> / <?php echo esc_html($total); ?> 已选择开启</strong><div><button type="button" class="button" data-lwek-toggle="1">全部开启</button> <button type="button" class="button" data-lwek-toggle="0">全部关闭</button></div></div>
                <div class="lwek-grid">
                <?php foreach ($this->modules as $key => $module) { ?>
                    <article class="lwek-card"><div class="lwek-card-top"><span class="dashicons <?php echo $key === 'pdf-library' ? 'dashicons-book-alt' : 'dashicons-layout'; ?>" aria-hidden="true"></span><label class="lwek-switch"><input type="checkbox" name="modules[<?php echo esc_attr($key); ?>]" value="1" aria-label="<?php echo esc_attr('开启' . $module['title']); ?>" <?php checked($enabled[$key]); ?>><span aria-hidden="true"></span></label></div>
                    <h2><?php echo esc_html($module['title']); ?></h2><p><?php echo esc_html($module['description']); ?></p><div class="lwek-card-foot"><span>建站老王</span><span><?php echo isset($this->conflicts[$key]) ? '原插件冲突，尚未接管' : ($enabled[$key] ? (isset($this->loaded[$key]) ? '模块已加载' : '开关已开启，等待 Elementor 加载') : '已关闭'); ?></span></div></article>
                <?php } ?>
                </div>
                <div class="lwek-save"><button type="submit" class="button button-primary button-hero">保存组件设置</button><span id="lwek-dirty" role="status" aria-live="polite">修改开关后点击保存，再刷新 Elementor 编辑器。</span></div>
            </form>
            <details class="lwek-help"><summary>安装、迁移与使用说明</summary><ol><li>需要 WordPress 6.0+、PHP 7.4+、Elementor 3.5+；免费版 Elementor 即可，无需 Pro。</li><li>已有独立插件：先在合集勾选对应组件并保存，再停用独立插件，由合集接管。</li><li>打开 Elementor 页面，在「FUCUO 组件库」中拖入组件，也可直接搜索组件名称。</li><li>PDF 资料在本菜单下的「PDF 画册」添加；客户填写的下载资料在「下载客户资料」查看。</li><li>画册使用媒体库公开文件地址供在线阅读；资料表单是下载引导，不提供 PDF 文件保密或访问权限保护。</li><li>保存开关会清理 Elementor 生成文件；页面缓存、服务器缓存及 CDN 缓存需按网站环境自行清理。</li><li>停用或删除合集不会自动删除页面配置、PDF、客户资料及开关设置。</li></ol></details>
            <section class="lwek-note lwek-about" aria-labelledby="lwek-about-title">
                <h2 id="lwek-about-title"><?php esc_html_e('关于 FUCUO Elements', 'fucuo-elements'); ?></h2>
                <p><?php esc_html_e('FUCUO Elements 由建站老王维护，为 Elementor 提供可独立开启的组件，包括幻灯片、画廊、响应式手风琴、PDF 画册和 WhatsApp 询盘按钮。', 'fucuo-elements'); ?></p>
                <p><a href="<?php echo esc_url('https://fucuo.cc/'); ?>" class="button"><?php esc_html_e('访问 FUCUO 官网', 'fucuo-elements'); ?></a></p>
            </section>
        </div>
        <?php
    }
}